Machine for finishing top-lift edges



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Jun 16, 1942. Q LAWSON 2,286,214

MACHINE FOR FINISHING TOP-LIFT EDGES Filed March 16, 1938 '7 SheeiS-Sheet a8, 19. alsa Patented June 16, 1942 MACHINE FOR FINISHING TOP-LIFT EDGES Oscar L. Lawson, Lynn, Mass., assignor to Lawson- Porter Shoe Machinery Corp., Lynn, Mass., a corporation of Massachusetts Application March 16, 1938, Serial No. 196,294

2s claims.

My present invention is a novel and improved apparatus or machine for operation on the top lift edges of heels, and comprises a novel method for edge-finishing or edge-setting of the entire periphery of the top lift, both along the heel breast and around the rest of the edge.

Heretofore, it has been customary to either complete the edge-fitting or setting operations by a hand-burnishing tool or by a machine tool against which the heel and attached top lift were held and oscillated, in which case the heel breast still had to be set by hand. In suchv prior operations, the top lift, usually attached to a wooden heel, was mounted on an oscillated jack and the heel moved in contact with the xed edge-setting tool while the jack and the attached heel was rotated or oscillated.

Such prior devices, wherein the jack and heel as well as the top lift; were movable, providing for rotative movement against the entire heelclamping devices, rendered the machine extremely complex; and furthermore, no prior method, so far as I am informed, has ever been devised vto finish and set the edge entirely around the periphery of the top lift, viz., across the heel s breast, as well as around the sides and back.

My present invention is directed to overcome the difficulties heretofore experienced in machines of this type and, furthermore, to provide novel, improved, and automatic means to effect a complete edge-fitting and setting operation entirely around the periphery of the top lift, both across the heel breast, around the sides and back, and even on the corners of the top lift.

A further important feature consists in my means and mechanism `for producing this complete edge-nishing operation, substantially simultaneously, or substantially successively, and with a plurality of edge-setting tools.

Further important features consist in the arrangement of yielding mechanism to hold the operating tools in contact with the top lift while the heel and top lift are held relatively rigid, and the edge-setting tools are oscllated about the same.

Al still further feature consists in the capacity of angular adjustment of the edge-setting tool relatively with the heel and top lift to be operated upon, since top lifts are frequently formed with a bevel or other divergent angle relatively to the base of the wooden h'eel to which they are attached and, hence, the nishing, burnishing, or setting tool must accurately t such angle, and 1 have provided eicient means to effect this adjustment.

Still further features consist in the capability of providing a heating element carried by the oscillating tool and supplying heating means to such element during the oscillation of the tool.

Still further novel features consist in the means U0 cf automatic adjustment and for clamping of the heel and its attached top lift in the machine, means for performing the prescribed plurality of burnishing operations or oscillations, and thereupon releasing the heel-clamping mechanism to permit the operator to remove the finished heel and replace it with another to be operated upon.

An additional and important feature consists in means for adjusting the tension of the setting tools on the work, as well as adjusting 'the angle of the same, and also permitting these adjustments to be made without stopping the machine and during its continuous operation.

In carrying out my invention I provide a simple, economical, eicient, and compact apparatus operating on the novel method of holding the heel relatively fixed while oscillating the edgesetting tools thereabout, and I believethis is a distinct novelty in this art and, therefore, I wish to claim the same herein broadly.

Referring to the drawings illustrating a preferred embodiment of my present apparatus, to carry out my novel method of edge-finishing;

Fig. 1 is a side view of my machine;

Fig. 2 is a plan view;

Fig, 3 is an enlarged fragmentary View of one type of nished top lift;

Fig. 4 is an enlarged cross-sectional fragmentary view showing the edge-setting tools operated on the heel breast and the rear of the top lift simultaneously and showing the workresi*I against which the top lift is positioned;

Fig. 5 is an end view looking from the left of Figs. 1 and 2;

Fig. 6 is a cross-sectional view on the line 6-6 of Fig. 1 illustrating the normal position of the devices to lift the burnishing tool;

Fig. '7 is a corresponding view to Fig. 6 showing a different position of the locking latch;

Fig. 8 is a fragmentary View illustrating the further operation of the latch in Figs. 6 and 7;

Fig. 9 is an end View from'the right of Figs. 1 and 2;

Figs. 10 and 11 are cross-sectional views, respectively, on the line IIJ-l0 of Fig. 1, showing the edge-setting tools in retracted and then lnoperative position relatively with the top lift;

Fig. 12 is a cross-sectional fragmentary view illustrating the edge-setting tools at the limit of their respective paths of oscillation;

Fig. 13 is a cross-sectional View on the line I3-I3 of Fig. 9;

Fig. 14 is an enlarged cross-sectional view on the line |4I4 of Fig. 13;

Fig. 15 is a cross-sectional view on the line I5-I5 of Fig. 13;

Fig. 16 is a fragmentary cross-sectional view on an enlarged scale on the line lli- I6 of Fig. 13;

Fig. 17 is a fragmentary view on the line |1- I1 of Fig. 14 showing the means for adjustment of the spring tension.

Fig. 18 is a fragmentary cross-sectional view of the spring and adjusting means cooperating with the cam section on the heel breast edge-setting tool.

Figs. 19 and,20 are fragmentary views illustrating the different operative positions of certain cam and latch mechanism.

Referring to the drawings, I designates a suitable support, to which a base plate 2 is attached by bolts 3-3, said base plate having formed thereon upstanding side frames 5 and 6 and a rear cross-frame 1 which carry the various bear ings and supporting means for the apparatus. Formed in the upstanding frame 6 is a bearing 8 to receive the shaft I6 of a drive pulley I2, which pulley is mounted on a hub I3 on said shaft I0 outside'the bearing 8 and is rotated by\a beit I4 connected with any suitable source of power. On

the inner end of the shaft I0 is secured a pinion I5, viewing Figs. 1 and 2, meshing with and driving a gear I6, which gear is mounted on a hub I1 and is freely rotatable on a clutch shaft I8, rotatable in suitable bearings 28 on the frame 5, and 2I on the frame 6.

As the belt I4 and pulley I2 are in constant rotation, as well as the pinion I5 and the gear wheel I6, in order to connect the same with the clutch shaft I8 and operate the mechanism, I provide a'sliding clutch 25 carried by a hub 26 keyed to the shaft I8 and operable toward a cone clutch-bearing 21 secured to the face of the gear wheel I6 by the action of a coiled spring 28 surrounding said clutch shaft I8. The hub 26 is formed with a groove in which a shifting lever 38 operates and is pivoted at 3l on a. bracket 32 secured to the base 2 by bolts 34 passing thru a ange 33 formed on the bracket 32, as best shown in Figs. 1 and 11.

'I'he lower end of the shifting lever 30 is provided with an adjustably threaded bearing screw 35, adapted to be engaged by a flattened face 36 formed on a shaft 31 with cut-away corners 39-36 between each side of the face 36, said shaft being mounted in a lug upstanding from the ange 33 and having a lever 40 secured to said shaft 31 to operate the same. Swinging of the lever 40 acts to oscillate the shifting lever 30 on its pivot 3I and to either compress the spring 28 and release the clutch shaft I8 from engagement with the gear I6 or to permit the spring to force the clutch members 25 and21 into engagement and, hence, to connect the clutch shaft I8 with the rotating gear I6, as will be readily understood.

I have devised important apparatus to perform a. predetermined number or series of oscillating actions on the edge-finishing tools and, thereupon, to withdraw said tools and simultaneously to release the clamping action holding the heel in its position. 'This momentary heel-releasing movement permits the operator to remove a, nished heel and to replace the same with another heel to be operated on, just sufficient time being allowed for this operation. Thereupon, the clamping devices are actuated to engage and hold the new heel, to force it in position against a work-rest, and immediately thereafter for the burnishing tools on the rear and on the heel` rest to be moved into contact with the top-lift, and the series of edge-setting, burnishing, and finishing operations to be performed and then the releasing actions to occur, all in a complete automatic cycle and without stopping the mechanism.

Also, I have arranged the heel-clamping members, as well as the burnishing tools, in a way to insure that the operator may have a minimum of effort in placing, removing, and replacing with another heel, as well as to insure as a safety factor the operators handling of the heel. In fact, it is perfectly feasible for the operator to keep a hand on the heel being operated ori during the entire oscillations of the burnishing tools as well as during the clamping and releasing actions of the heel-engaging members. This advantage is A secured by having the heel blank in a horizontal position and against a bottom rest bearing on the heel breast of the shoe and keeping the heel stationary in relatively fixed position while the edge-setting tools are oscillating around the top lift.

The heel-clamping devices will now be described. Formed on the upper part of the frame 5 (see Figs. 1 and 13) is a hub 42 thru which a shaft 43 may slide. Also formed as a laterally extending flangeon the top of the frame 5 is a bracket 45 carrying a hub 46 thru which a sleeve 41 slides, said sleeve carrying on its interior a shaft 48 in alignment with the heel 50 to be operated on, and having a rocking plate 5I provided with a pair of ears 52 mounted on a pivot 53 thru the end of theshaft 48. This rocking plate 5I has a mass of rubber or fibrous material adapted to yieldingly engage the heel-seat portion of the heel when the shaft 48 is moved in contact with the heel 50, said rubber 55 extending thru a central opening in a plate 56 adapted to engage the marginal edge of the heel.

This plate 56 is also yieldingly mounted and secured to the rocking plate 5I by a plurality of headed screws 51 with their respective Shanks passing thru recesses in the rocking plate 5I, and with the other end adapted in a plate 56 and each with a coiled spring 56 bearing therebetween, see Fig. 13.

The shaft 48 within the sleeve 41 has a considerable portion formed with the reduced diameter to permit a coiled spring 66 to encircle the reduced diameter, as shown at 6I, of the shaft 48, which coilbears between a plug 62 at the end of the sleeve 41, viz. at the right viewed in Figs. 1 and 13, and the shoulder formed between the main diameter of the shaft 48 and the reduced portion 5I. This reduced portion 6I extends beyond the plug 62 and is rigidly attached to a link 66 by a. pair of nuts 64 and 55 being threaded around the end 6I. This link extends downwardly and is formed with a split portion at 61 to engage and be clamped about a bar 68 by a clamp 10 passing thru the split arms 61, which bar 68, in turn, is pivoted'at 1I to a forked end of the shaft 43, which is adapted to slide in the bearing 42. Said shaft 43 at its for- Vward end is also forked, as shown at 13, to receive a work-rest 15 which can be raised and lowered in the forked portion 13 and held in adjusted position by tightening la set screw Y14. On the top of the work-rest is secured a heel-engaging member of rubber, fibre, or other suitable material 11 by a screw 16 which is adjusted for proper height on which to rest the heel breast of the heel 50.

The shafts 43 and 48 are capable of being moved parallel in their respective bearings 42 and 45 and, being attached by links 55, thus enables the heel 50 to be placed in position on the rest 11 and loosely in contact with the rubber 55 on the tilting plate 5| while the shafts 43 -and 48 are in retracted position, viz.; moved at the right viewed in Figs. 1 and 2. Thereupon, a sliding movement of the shafts will permit the bottom of the top-lift 80` to engage a workrest 8| (Fig. 15), preferably of relatively hard yielding material such asUskide, fitted in a cupshaped member 82 mounted on a rod 84 rigidly adjusted to the desired position and in alignment with the burnishing tools and between which clamping members 8| and 55 the heel 50 is held during the operation of the edge-setting tools.

This rod 84 is adjustable lengthwise by manipulation of a rotatable thumb nut 85 threaded on the rear portion of the rod and bearing against the upstanding portion 86 of a bracket 81 secured to the frame 6. The forward part of the shaft 84 adjacent the cup 82 is adapted to slide in a bored opening thru a center hub-like portion 88 of the face plate 80 on the oscillating tool-holding member, to be described.

In order to effect longitudinal movement of the rod 84 to adjust the same by rotation of the thumb nut 85 I hold said shaft against rotative movement by forming a groove 82 at the outer-end, viz., at the left viewed in Figs. 1 and 3, and t a set screw 8| thru a bored opening in the portion of the bracket 86 to engage the groove 92.

The mechanism for holding and operating the burnishing tools and |0| will now be described.

I provide the burnishing, edge-setting, and finishing tool |00 of suitable contour-with the depending flange to fit over and contact with the sides and rear of the top-lift 80, oscillating the same under spring tension, and preferably under an adjustable spring tension, to effect the finishing operation on the main periphery of the top-lift. The finishing tool |0| is arranged to oscillate to-and-fro over the heel breast portion of the top-liftI and both tools are simultaneously withdrawn from contact with the top-lift in the `cycle of operations when the heel-clamping instrumentalities are released to permit the change of removing a finished heel and one to be operated on.

It is desirable to have the tool |00 interchangeable to fit different widths and forms of top-lifts, and for this purpose the tool |00 is provided with a recess or opening to fit over a stud |02 which is secured in the sliding head |03, a spring |04, which is attached to the head by a screw |05, acting to hold the tool |00 in position and swinging the spring |04 at either side, upon loosening the screw |05, permitting the replacement of the tool |00, seeFigs. 4 and 13.

Also fitted in the head |03 is an electrical heating unit |06, which preferably extends into direct contact with the portion of the tool |00, said tool being recessed to receive the same, as best shown in Fig. 4 at |01. 'Ihis head |03 is arranged to slide in the arc of a circle with the bottom edge of the top lift as the center. To accomplish this purpose I form on the head |03 an undercut guide ||0 tting in a corresponding slideway ||2 formed in the block ||5, both guideway and slideway being in the form of an arc to permit the adjustment of the tool |00 about the lower edge of the top lift, as above noted.

A fiat spring ||6 secured by a screw ||1 in the block ||5, and having an end portion ||8 in contact with the rear extension of the head |03 (see Fig. 13) will serve to frictionally hold the head |03 to whatever position it may be adjusted in the guideway and, hence, relatively with the block ||5. structed and arranged to extend thru an opening |20 in the face plate 30 and the block ||5 is mounted upon, or is integral with, a post |2| vertically positioned immediately backv of the face plate 80 and has its lowermost portion secured to a reduced part |22 of the shaft |23.

Said shaft has its end, viewing the right of Fig.

13, swaged or fitted in a slide |25, mounted for vertically sliding movement in a guideway |26 on the rear of the face plate 90.

At the opposite end of the shaft |23 (see Figs. 6, 7, 8, 13, and 16) is a cam follower in the form of a roller |21 in position of the line of movement of a cam to raise the entire post |2| (Fig. 13) and the attached lock ||5, head |03, and finishing tool |00 vertically when the cycle of operations has reached the point for releasing the burnishing tools from contactV with` the top lift, as will be described.

To effect the angular adjustment of the head |03 along arc-shaped guide and slideways |0 and H2, I secure to the post |2| a stud |30 on which is a bell crank lever |8I, best seen in Fig: 13, having one arm |33 mounted under a flat portion of the head |03 and with the opposite arm |34 in contact with a disc |35 secured to the end of a hollow shaft |36 encircling the rod 84 and extending rearwardly or to the left, viewing Figs. 1 and 13, where a yoke |38 is attached thereto, in which a pair of depending pins |39|39 carrying rollers |40 engage the groove in the yoke |38, said pins being mounted in the opposite arms of a shifting lever |4|, which lever, see Fig. 2, is pivoted at |44 on a part of the bracket 81 and carries a handle |45 with which to operate the shifting fork. Manipulation of the lever will thus move the shaft |36 to and fro and, consequently, moves the disc |35 and oscillates the bell crank lever to adjust the head |03 angularly.

during the continuous operation of the machine. i

'I'he shaft |36 isrotatably mounted within a hollow rock shaft or sleeve which, in turn, is adapted to rock orturn in ball-bearing raceways |5| and |52 arranged in portions |53 and |54 of the frame, and carries at the forward end by a wedging fit the hub |55 of the-oscillating box |56 to which the face plate carrying the block ||5 and attached parts is secured. Oscillation of the sleeve |50 thus oscillates the box |56 and the tool I 00 thru the construction and arrangement of parts thus described. To oscillate these members (Figs. 5 and 11), I secure to the sleeve |50 by a key or wedging fit av pinion |60, preferably adjacent and outside the ball-bearing raceway |5|, which pinion is engaged by a rack |6| on a segment |62 mounted to rotate on a stud |63 fitted in the extension on the frame 6.

To oscillate the segment |62 (Fig. 5), I provide a link |65 having its upper end engage a pin |66 on the segment |62 and with its lowermost end bored to receive the shank of a hand wheel |68, said shank having a reduced portion cross-head by a knurled thumb nut |12, having its shank |13 threaded into a tapped recess in the block |10. Manipulation of the thumb nut |12 produces a shifting of the block |10 and,-

The parts just described are con` Aof the machine, I provide novel means to accomplish this desirable result. As best shown in Fig.

14, I form on the post |2| a stud |90, which stud is engaged by a correspondingrecess thru one mounted on a p ost |92 ntted within the face plate 90. This lever |9| is formed with a depending web |93, with a bored bearing to receive the end of a rotatable worm |94, the other end of said worm passing thru a corresponding-bored opening in the lever |9| adjacent'the end surrounding the post |92, and is provided with' a miter gear |95 (Figs. 14 and 1'1) on its outer end, which in turn meshes with the gear |96 secured on a post |91, to which also is attached a knurled adjusting wheel |96. having one portion of said wheel projecting thru a slot |99 in the top of the oscillating box |56, as best shown in Figs. 2 and 17. Attached to the worm |94 is a' spring 200, the end of the spring entering the groove in said worm and with the opposite end of the spring attached to a post 20| fitted in the box |56. Thus, by manipulation of the projecting edge of the wheel |98, the worm |94 is rotated and the end of the spring 200 encircling said worm is adjusted lengthwise of the lever |9| to vary the tension desired on the tool |00 and all ovel` the outside of the oscillating box, and at any time.

In order to supply electric current to the heater |06, I attached to the exterior of the oscillating box |56 a pair of metal contacts 204 and 205 mounted upon insulating material 206, said contacts and the insulation being in the form of an arc or crescent to correspond with the oscillations accorded to the box |56, as shown in Figs. 6, 7, and 8, the contact'points 201 and 209 being in. xed relation to transferring current to the strips 204 and 205 during the oscillations and, hence, to the heating unit |06, the heating wires being laid thereinfrom any suitable source of power and, preferably, thru a rheostat (not shown) to vary the degrees of heat desired for the particular work in hand.

The heel breast finishing tool |0| is not required to have as great a range of oscillations as that desirable and necessary for the tool |00, since the heel breast of the top lift is relatively short. In order to loperate the tool 0| thru the oscillations to-and-fro across the heel breast, and also to move-the tool |0| away from contact with the top lift when the two tools are separated to remove a finished heel and replace the same with an unfinished heel, as well also `to provide an angular adjustment to the tool |0| to fit varying angular heel breast edges, I mount the tool |0| in a movable holder 2|0 secured on a support 2|2 (see Figs. 10, 11, 12, and 13).

To permit the tool |0| to be angularly positioned in its holder 2| 0 I provide on said holder (see Fig. 4) aj circularly curved face 229 seating on a correspondingly curved face'of holder sup- -port 2| 2, the center of curvature corresponding .held in its carrierv under yielding tension by' spring clip 23| secured to the opposite side of the support by the screw 232.

The support 2|2 for the breast iron |0| is rigidly attached to a supporting member 2|4 by enll of the lever 9|, having its opposite end screws 2|5 and has a depending shank 2|6 adjustably received in a clamp 2|9 pivotally supported on center 245 at the end of arm 244 of a bell crank lever pivoted on the fixed center 241. 'I'he other arm 246 of the lever has a cam follower 249 cooperating with cam 250, which thus serves to position the iron and its support at a variable distance' from the heel, viewing, for example, Fig. l0. To maintain the follower in contact with the cam andalso to provide an optothe edge of the top lift at the breast surface 75 erating pressure of the iron on'the heel breast during the burnishing operation, the end of the lever 244 (see Figs. 1l and 18) receives the rounded head 24| of a screw 239 adjustable by means of the knurled head 240, which screw enters the block or nut 236 slidable in casing 234 and is pressed upwardly, viewing the figures, by the' spring 233. The casing 234, as seen in Fig. l1, is mounted by a bracket 235 attached to the plate 33 by a bolt 236.

Tooscillate the tool |0| the clamp 2|0 has projecting therefrom the arm 220 to which is connected at 222 the link 22|, tlie other end of which is connected to the oscillating arm 225 by wrist pin 224 adjustable in slot 226. 'I'he arm 225 is mounted onl the stud |63 and is secured to the segment |62 to move therewith but extends in the opposite direction to the latter. At any given time the pivotal connection of the clamp 2|6 on the end of arm 2 20 may be considered as fixed since it is supported relative tothe fixed center 241 by the cooperation of the supporting -spring 233 on the onehand and on the other the the heel in contact with the iron or of the surface of the cam underriding follower 248, as the case may be. .'I'hus, oscillating arm 225,` connecting link 22| and arm 220 function as a. linkage of the kind known as a double rocking lever, and as the arm 225 oscillates, the arm 220 and the clamp 2|8 carried thereby will be rocked about the pivotal connection of the latter at 243 to the end of the lever 244 and the iron |0| thus oscillated across the breast surface of the heel.

When the follower 2 40 is opposite the low portion of the cam 250, the spring 233 acts to press the iron 0| with yielding pressure against the breast surface of the heel, as shown in Figs. 11 and 12. When, however, the follower rides on to the rise portion of the cam, the levers 244- 246 swing counterclockwise about the center 241, retracting clamp 2|8 (and the iron holder and iron carried thereby) downwardly, viewing those figures, against the stress of spring 233 to the position shown in Fig. 10 wherein the iron |0| is away from the heel although it may still oscillate under the action of crank 225 since the pivotal point of connection 245 of the clamp 2|8 thereto, although shifted, may still be considered a xed point as regards the operation of the linkage of which the oscillating arm 225 forms a part 'I'his retraction of the breast iron is timed to occur when the iron |00 is retracted, and while the two irons are so retracted, the clamping mechanism for the heel is opened to permit a new heel to be inserted.

Heat is supplied to the tool 0| by a heating una 25s heid in Contact with the support m and holder 2|0 by a spring clip 256 to which heating wires 251 are led from a suitable source of power.

The oscillations of the tool |0| and its supporting members are comparatively slight; hence the wires will not be bent. In the heating supply thru the contacts 204 and 205 to the heating element |06 in the oscillating head, a pair of contacts 258-258 are fixed inside the oscillating box |56, and electrically connected to the arcshaped contacts 204 and 205 on the exterior of the same and from these interior contacts, wires 259 lead to the heating unit |06, see Fig. 14.

Since the-heating wires 251 partake of the oscillations of the supporting members for the tools it is desirable to arrange contact plates and brush members therefor, and for this purpose I lead the wires 251 to contact plates 3|0 and 3|| engaged, respectively, by brush contacts 3|2 and 3|3 (Fig. 1) which project from a box 3|5 xed on an arm of the frame and from which box the heating wires are led to any source of ,power. This arrangement permits the oscillations of the tool-carrying members supplying current to the heater 255 in a similar manner to that already described with the heating element |06 for the heating tool |00.

The means for releasing the clamping members on the heel 50 will now be described. The cam shaft 260 (Fig. 2) is ittedat one side of the machine in suitable bearings in the frames 5 and 6, and this shaft is rotated by the pinion 26| on the shaft I8 meshing with the gear 262. On the outer end of the cam shaft 260 beyond the frame 5 is a face cam 263 (see Figs. 2 and 9). Mounted on a bracket 264 at one side of the frame 5 on a pivot 265 is a rocker arm 266, having at one end a roll 261 adapted to traverse the cam path 263, the other end of the arm being forked, as shown at 268, Fig. 9, and each fork carrying a pin 269 to engage a groove in the collar 210 secured to the sleeve 41 (Fig. 13). A spring 21| attached to the arm 266 at one end and to the opposite end 212 on a portion of the bracket 213 carrying the bearing 46 holds the rocker arm 266 with its roller in contact with the cam 263.

The actuation of this cam will move the entire heel-clamping mechanism together with the heel breast rest 11 to the right, viewing Figs. 1, 2, and 13, thus releasing the heel.

The arrangement for raising and lowering the heel breast tool |0| has already been described, and the means for raising the post |2| and, hence, lifting the tool |00 simultaneously to release the heel 50 will now be described. Secured to the pivot pin 215 carried by an arm 216, secured by a bolt 211 to the frame 1, is a link 218 carrying a roll 219 on its side in line to be engaged by a cam 280, see Figs. 5 and 11. At the upper part of the link 218 on a pivot pin 28| is a second link 282 extending across to the opposite side of the machine where it is attached by a pin 283 to an arm 284, carrying a cam 285 on the side, as best shown in Figs. 9 and 11.

.r This arm 284 is pivoted at 286 to a portion of the frame and is rocked touand-fro on its pivot 286 by the action of the cam 280 on the roll 219 of the arm 218. After a predetermined number of oscillations of the oscillator |56, the cam 280 rocks the links 218, 282, and 284, to bring the parts into a position wherein they may be effective to retract the iron |00, in the manner now to be described, by action on the projecting cam Vroller |21 (Figs. 13 and 16) on the post 2| to.75 this work rest is supported at the left-hand side,f

, |26 and return the roll |21 to which 'the tool |00 is attached. see Figs. 19 and 20, said roll |21 projecting thru a slot 281 in the rear of the wall of the oscillator 4|56.

Adjacent this roll |21 is a Uhshaped latch 290 pivoted at 29| to the oscillator |56, and having a notch 299 in the upper portion of one arm, viz. the right arm, viewing Figs. 6, 1, and 8. On the left arm 2921s an inclined projection 293 engaged by a trigger 294 held in contact therewith by a spring 295, also secured to the back of the oscillator |56. An upstanding pin 300 is formed on the latch290 to engage the cam path 285 at a predetermined time, viz. after four complete oscillations of the oscillator |56 and the tools |00 and |0|. 30| in line to be engaged by the shouldered portion 299 of the latch 290 when and if the latter is moved underneath the same, as will now be explained.

Referring to the showings i'n-Figs. 6, 7, 8. 19 and 20, the roll |21 on the shaft |23 is engaged by the cam surface 303 on the arm 284as this arm is moved inwardly or to the left, viewing Figs. 6, 7, 8, 19 and 20, by the links 282 and218 and cam 280, whereupon the roll |21 in its next oscillation striking against the cam face 303will be forced radially inwardly along the slot 281, raising the post |2| and oscillated parts and lifting the tool |00 from the top-lift. As the roll |21 nears the end of the slot 281, the spring 295 pressing on the trigger 294 moves the entire latch 290 on its pivot 29| to the left (as show'n in Figs. '1 and 19), permitting the notch 299 to be'forced under the shaft |23 and the fiat surface 30|, as

shown in Fig. '1, thus holding the tool |00 in raised position until the latch 290 is released.

- and the surface 30|, and substantially simultaneously the cam 285 will be engaged by the pin 300, rocking the latch 290 on its pivot against the non 29s and the trigger is then in the position shown in Figs. 8 and 20, whereupon the roller |21 being released, the action of the spring 200 will serve to move the entire mechanism supporting the tool |00 downwardly in the guideway the outer limit of the slot 281..

Meanwhile, the operator has placed another heel in position and the nishing tools |00 and |0| coming in contact with the top-lift, still under the influence of the respective springs 200 and 233, maintain the yielding tension of the edging or nishing tools incontact with the toplift during the succeeding oscillations and the burnishing actions.

Referring to Figs. 1, 2, 13 and 15, the irons |00 and |0| (Fig. 13) are of conventionali'orm having flanges overlying the tread face of the lift 80. To permit the operation of both these irons to act on the complete periphery of the heel work rest 8| of the left-hand member of the jack, viewing Fig. 13, is such as to be received entirely within the periphery of the tread so that the flanges may clear the same. It will be noted further that the shaft 84 which carries Formed on the post |23 is a flat surface viewing Fig. 13, from the supports |53 and |54 'and extends therefrom in overhanging relation,

scribed opening formed through the' central hublike portion 08 of the face plate 00. 'I'he box |50 which carries this face plate is mounted on the end of shaft |50 and therefore is likewise suD- ported from |53 and |54 in overhanging relation while the iron carried thereby projects at the opposite side so that the supporting means for the iron is organized in an annular zone about the axis of the shaft 84 and no part of the supporting means projects into the plane of the lift within the orbit of the iron |00 to obstruct access of the irons |00 and |0| thereto. Iron |0| (see Fig. 10) is supported and operated by means organized radially outward from the heel lift. The heel seat clamping element 55 of the jack and the breast gauge 'I1 are likewise supported from the xed hubs 42 and 46 at the right-hand side of the location of the top lift. viewing Fig. 13, so that again no obstruction is offered to the two irons in their plane of action, that is, in the plane of the top lift, but on the contrary there exists an unobstructed clearance around the top lift when the latter is held by the jack which permits the operation of the burnishing irons on the entire periphery of the heel surface in the same operation, that is, in the case of a heel of conventional form both on the breast and around the outer periphery. In other words, the means forsupporting the heel and supporting the irons are organized respectively axially outwardly of the lift and radially outward of the operating paths of the burnishing irons.

I prefer to arrange the cams to permit a series of four oscillations to-and-fro of the burnishing tools on the top-lift, and thereupon the cam 200 will operate as just described.

The operation of the machine will be readily understood. With power applied, the mechanism is constructed and arranged so that the tool |00 and its carrier, and the heel-breast tool I0| and its carrier, will be in continual oscillating motion, and is adapted to make four burnishing operations on the top lift 80 with the 'tools in contact therewith. Thereupon, the carrier for the tool |00 is lifted and the latch mechanism illustrated in Figs. 6, '7, 8, 19 and 20 is-operated to hold the carrier for the tool I 00 in raised position while the clamping plate is moved outwardly or to the right, viewed in Fig. 13; thereby releasing the heel 50, which heel is thereupon lifted and removed by the operator, who replaces a new heel on the rest 'l1 while the oscillations of the tool |00 and |'0I still continue but without the burnishing effect. 'I'hus the tool |00 is held in raised position during a complete oscillation by the latch mechanism operated by the cams 280 and 305 and associated parts, which thereupon release the carrier of the top tool |00 to bring the top tool |00 in contact with the top lift 80 Just after the clamping plate 5I has been moved to the left to hold the heel 5l in clamped position until an additional cycle of operations, viz., four, are performed by the burnishing tools; whereupon the tool |00 and the clamping plate are again moved to release the heel for removal and replacement of a new heel. The time of one oscillation when the heel is released is ample for the operator to remove the heel with the burnished top lift, and replace with another heel and top lift to be operated on. Thereupon the operations automatically continue.

I claim:

1. In a machine of the, class described a pair of aligned members for contact with tread and seat surfaces of a heel, relatively movable to clamp and -suspend a heel between them, edge burnishing means disposed substantially inthe plane of the top lift of a heel so heid and driving means for effecting relative movement between the clamped heel and said burnishing means causing the latter to traverse substantially in such plane the entire periphery of such top lift.

2. In a machine of the class described a tool carrier having an open center and means exterior to said center for supporting the same, a burnishing iron carried by the carrier facing inwardly toward'said center, means for supporting a heel with the periphery of its top lift presented to the burnishing iron comprising opposed elements spaced along an axial line passing through said center and including an overhanging element passing through said open center. said elements and their supports lying in all positions of the elements axially outward of such lift or radially outward of the burnishing iron, whereby the path of the iron is unobstructed thereby throughout the periphery of the heel, and means organized exteriorly of the said path for effecting relative rotation between the tool carrier and the heel supporting means.

3. In a machine of the class described a hollow shaft having a tool carrier at an end thereof. a burnishing iron on the carrier at the side away from said shaft end and facing inwardly toward the axis of the shaft, a rod extending through the hollow shaft having at its extremity a heel engaging element, an opposed heel engaging element, one of the elements engaging the tread of the heel entirely inward of the periphery thereof and the other engaging the heel remote from the top lift whereby the heel is supported with an unobstructed clearance entirely about the same in the path of the iron and means for relatively revolving the tool carrier an'd said heel engaging elements to cause the iron to travel abut the periphery of the heel top lift.

4. A machine of the class described comprising a fixed support having mounted thereon in overhung relation a member for contacting the tread surface of a heel, said member arranged to be received entirely within the periphery ofy said tread surface, a second fixed support at the side of the heel further from the first support having a member to engage the seat surface of the heel, the members being arranged for relative approach and recession along a line substantially perpendicular to the tread to clamp and release a heel, an iron opposing the periphery of -the heel adjacent the tread, means for supporting the same organized in an annular zone about said line, and means for effecting an oscillating rotary movement between a clamped heel and the iron to cause the iron to traverse said periphery, the above described arrangement of the supports and the members carried thereby defining an unobstructed clearance` space extending completely around the tread periphery of the heel in the path of the iron.

5. A machine of the class described comprising a fixed support having mounted thereon in overhung relation a shaft having at its extremity a member for contacting the tread surface of a heel, said member arranged to be received entirely within the periphery of said tread surface, a second fixed support at the side of the heel further from the rst support having a i member to engage the seat surface of the heel,

, rangement of the supports and the members carried thereby defining an unobstructed clearance space extending compeltely around the tread periphery of the heel in the path of the iron.

6. In a machine for finishing the edge portions of top lifts of heels for boots and shoes, comprising means to engage and hold the heel, operating means to engage the top lift edge at at a plurality of points, and means to effect relative movement between said top lift and the operating means to operate upon the heel breast and the rear edge portion simultaneously.

7. Ina machine for finishing the edge portions of top lifts of heels for boots and shoes, comprising a plurality of nishing tools arranged to contact said edge portion under yielding tension, and means to produce relative rotative movement between the top lift and said tools to finish the entire periphery of the top lift.

8. In a machine for finishing the edge portions of top lifts of heels for boots and shoes, comprising a plurality of finishing tools arranged to contact said edge portion under yielding tension, and means to produce relative rotative movement between the top lift and said tools to automatically finish the entire periphery of the top lift.

9. In a machine for finishing the edge portions of top lifts of heels for boots and shoes, comprising a plurality of nishing toolsv arranged to contact said edge portion under yielding tension, and means to produce relative rotative movement between the top lift and said tools to automatically finish the entire periphery of the top lift by a plurality of said relative movements.

10. In a machine for finishing the edge pornishing means, said edge-finishing meansoperating on the heel. breast and the remainder of the top lift as a simultaneous operation.

13. In a machine of the class described, means for supporting a heel positioned on an axis extending substantially prependicular to the tread surface thereof, a setting iron opposing the edge of the heel and means for oscillating it about said axis, a setting iron opposing the breast of tions of top lifts of heels for boo-ts and shoes,

comprising a plurality of finishing tools arranged to contact said edge portion under yielding tension, means to produce relative rotative movement between the top lift and said tools to finish the entire periphery of the top lift, and means to adjust the relative angle of said finishing tools and said top lift edge.

11. In a machine for finishing the edge portionsof top lifts of heels for boots and shoes, comprising a plurality of finishing tools arranged to contact said edge portion under yielding tension, means to produce relative rotative movement between the top lift and said tools to finish the entire periphery of the top lift, and means to adjust the relative pressure of the edge nishing tools.

12. In a machine for operating upon the top lifts of boot and shoe heels, comprising clamping means to hold said heel and top lift, edgefinishing means adapted to contact with the edge portion of 'said top lift, means for effecting relative movement between the heel and the edgethe heel and means for oscillating it about a center remote from said axis, and means for moving -said irons away from the heel.

14. In a machine of the class described, means for supporting a heel positioned von an axis extending substantially perpendicular to the tread surface thereof, a setting iron opposing the edge of `the heel and means for oscillating it about said axis, a setting iron opposing the breast of the heel and means for oscillating it about a center remote from said axis, and means for periodically moving the irons away from the heel without interruption of the action of such oscillating means.

15. In a machine of the class described, a'jack having opposed jaws for clamping a heel positioned on an axis extending substantially perpendicular to the tread surface thereof, a setting iron opposing the edge of the heel and means for oscillating it about said axis, a setting iron opposing the breast ofthe heel and means for`V oscillating it about a centre remote from said axis, means for moving the irons away from the heel without interruption of the action of such oscillating means, and means for separating the jaws of the jack to release the heel upon such movement of the iron.

16. In a machine of the class described, a jack having opposedjaws, for clamping a heel, an iron carrier mounted for in-and-out movement toward the heel, power means for oscillating the carriercontinuously orbitally around the heel, power means for periodically retracting the iron carrier from the heel without interrupting the oscillation thereof, and power means for separating the jaws of the jack to release the heel, such means being-timed for operation when the iron carrier is retracted.

17. In a machine of the class described, an'

iron, means for orbitally oscillating it. about an axis, a heel-holder including a part adapted to be advanced substantiallyalongsaid axis to present the tread portion of the heel to the iron, means for periodically retracting the iron from said axis, and means correlated therewith for thereupon retracting said holder part.

18. In a machine of the class described, an iron, means for orbitally oscillating it about an axis, a heel-holder including a part adapted to be advanced substantially along .said axis to present the tread portion of the heel to the iron, means for periodically retracting the iron from said axis without interrupting the oscillation thereof, and means correlated therewith for thereupon retracting said holder part.

19. In a machine of the class described, in combination with means for positioning a heel with its tread surface substantially perpendicular to the axis of the shaft hereinafter referred to, a rock shaft having a tool-holding member projecting outwardly therefrom in a plane transverse thereto, a slide on the member having provision for supporting an iron in over-hanging relation to the shoe heel, an arm pivoted on the` carried thereby inwardly toward the heel. and a follower on the slide projecting from the member and providing means by which the slide may be retracted outwardly against the spring.

20. In a machine of the class described. in combination with means for positioning a heel with its tread surface substantially perpendicular to the axis of the shaft hereinafter referred to, a rock shaft having a tool-holding member projectirg outwardly therefrom in a plane transverse thereto, a slide on the member. having provision for supporting an iron in overhanging relation to the shoe heel, an arm pivoted on the member engaging the slide, a spring connected to the arm to press the slide. to move the tool carried thereby inwardly toward the heel, means accessible et the exterior of the member for shifting the point of attachment of the spring to the arm, and a follower on the slide projecting from the member and providing means by which the slide may be retracted outwardly against the spring. 2l. In a machine of the class described, in combination with means for positioning a heel with its tread surface substantially perpendicular to the axis of the shaft hereinafter referred to. a rock shaft having a tool-holding member projecting outwardly therefrom in a plane transverse thereto, a slide on the member having provision for supporting an iron in overhanging relation to the shoe heel. an arm pivoted` on the member engaging the slide, a screw extending along the arm, a spring anchored to the member and having a loop engaging the thread of the screw, means accessible at the exterior of the head for turning the screw, and a follower on the slide projecting from the member and providing means by which the slide may be retracted outwardly against the spring.

22. In a machine of the class described, a jack having relatively movable jaws adapted to cooperate respectively with the tread and seat portion of a heel to position it along an axis extending substantially Aperpendicular to the tread thereof, a rock shaft oscillating about said axis having a tool-holding member projecting outwardly therefrom in a plane transverse thereto, an iron-carrying member thereon movable thereon toward and from said axis and having a projecting cam follower, a cam surface for cooperation with the follower, and means for periodically advancing it into the oscillating path of the follower thereby to move said member away from the axis.

23. In a machine of the class described, a jack having relatively movable jaws adapted to be moved together to engage respectively with the tread and seat portion of a heel to clamp the heel and to position it along an axis extending substantially perpendicular to the tread thereof, a rock shaft oscillating about said axis having a tool-holding member projecting outwardly therefrom in a plane transverse thereto, an iron-carrying member thereon movable thereon toward and from said axis and having a projecting cam follower, a cam surface for cooperation with the follower, and means for periodically advancing it into the oscillating path of the 'follower thereby to move said iron-carrying member-away from the axis, and means coordinated therewith for substantially simultaneous action for axially separating the jaws to release the heel.

24. In a machine of the class described, a jack having relatively movable jaws adapted to cooperate respectively with the tread and seat portion of a heel to position it along an axis extending substantially perpendicular to the tread thereof, a rock shaft oscillating about said axis having a tool-holding memberprojecting outwardly therefrom in a plane transverse thereto, a radial slide on the tool-holding member, an iron holder pivotally associated with the slide and having a tail portion adjacent thereto, a rotary member on the slide cooperating with said tail portion to effect pivotal movement of the holder, said rotary member being provided with an arm, and a. plunger for contacting said arm extending thru the rock shaft, and operable from the remote end thereof.

25. In a machine of the-class described, a jack having relatively movable jaws adapted to cooperate respectively with the tread and seat portion of a heel to position it along an axis extending substantially perpendicular to the tread thereof, a rock shaft oscillating about said axis having a tool-holding member projectingoutwardlytherefrom in a plane transverse thereto, a radial slide thereon, an iron holder pivotally associated with the slide, a member coaxial with the rock shaft, and having a manipulating portion ,at an end of the shaft providing for axial movement thereof,

and means on the tool-holding member responsive to the pressure of said member for rocking the iron holder without interruption of the oscillating movement thereof.

26. In a machine of the class described, means for supporting a heel along an axis extending substantially perpendicular to the tread thereof, a rock shaft oscillating about said axis having a tool-supporting member projecting outwardly therefrom in a plane transverse thereto, a member carried thereby having provision for supporting an iron in overhanging relation, said ironsupporting member being movable toward and from the axis and normally spring-pressed to move the iron toward the said axis, a cam follower on said member, a latch for securing the iron-supporting member in position with the iron relatively removed from the axis, movable cam surfaces respectively formed to cooperate with the follower to cause outward movement of the iron and to control the latch, and means for moving the cam surfaces into operative position adjacent the tool-holding member to engage the follower and operate the latch respectively.

27 In a machine for setting the edge of a toplift attached to a heel, a pair of edge-setting irons adapted to engage said lift simultaneously, one arranged to move along the edge of the breast of the top-lift and the other arranged to engage along the remaining edge of the top-lift, and means for causing relative movement of said irons in timed relation so that they are positioned at the extremities of their paths of travel at different times.

28. In a machine for setting the edge of a toplift attached to a heel, means for holding a heel, edge-setting means including a pair of edge-setting irons one adapted to set the edge of the breast of the top lift and the other adapted to set the edge oi the remaining portion of the top-lift, and means for relatively moving said holding means and edge-setting means to cause the latter to set the entire edge of the top-lift.

OSCAR L. LAWSON. 

